234375

Appears in sequences

• Numbers that are the sum of 3 positive 7th powers.at n=34A003370
• Expansion of g.f. (1 - 2*x)/(1 - 5*x).at n=8A005053
• Smallest label f(T) given to a rooted tree T with n nodes in Matula-Goebel labeling.at n=23A005517
• a(n) = Sum_{k=0..n} (k+1) * T(n,k), with T given by A026374.at n=13A026950
• a(n) = Sum_{k=0..n} (k+1) * T(n,k), with T given by A026386.at n=13A026955
• Numbers whose prime factors are 3 and 5.at n=33A033849
• Triangle whose (i,j)-th entry is binomial(i,j)*5^(i-j)*5^j.at n=23A038247
• Triangle whose (i,j)-th entry is binomial(i,j)*5^(i-j)*5^j.at n=25A038247
• Starts of runs of exactly 6 consecutive nonsquarefree numbers.at n=23A049535
• a(n) = 5^(n/2) for n even, a(n) = 3*5^((n-1)/2) for n odd.at n=15A056487
• Reciprocal of n terminates with an infinite repetition of digit 6. Multiples of 10 are omitted.at n=11A064565
• Composites which use less than all of their digits in their prime factorization.at n=29A074211
• Triangle read by rows. T(n, m) are the coefficients of Sidi polynomials.at n=25A075513
• Expansion of (1 + 3x - 2x^2 - 12x^3)/(1 - 9x^2 + 20x^4).at n=15A097111
• a(n) equals the (n*(n+1)/2)-th partial sum of the self-convolution 4th power of A010054, which has the g.f.: Sum_{k>=0} x^(k*(k+1)/2).at n=29A109415
• a(1) = 1, a(2) = 3; for n >= 3, take a(n) to be the smallest odd number not occurring earlier such that a(n-1) divides the concatenation a(n-2)a(n).at n=15A111386
• Triangle, generated from (3^(n-k) * 5^k) table.at n=43A120027
• a(3*n) = 3*a(3*n-1)-3*a(3*n-2)+2*a(3*n-3), a(3*n+1) = 3*a(3*n)-3*a(3*n-1)+2*a(3*n-2), a(3*n+2) = 3*a(3*n+1)-3*a(3*n) with a(0)=1, a(1)=2, a(2)=3.at n=23A133335
• a(4*n)=5^n, a(4*n+1)=2*5^n, a(4*n+2)=3*5^n, a(4*n+3)=4*5^n.at n=30A140730
• a(n) = 5*a(n-2) for n > 2; a(1) = 3, a(2) = 5.at n=14A163114